Cavity-enhanced spontaneous emission rates for rhodamine 6-G in levitated microdroplets

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:6977713

Barnes, M D; Whitten, W B; Ramsey, J M ^[1]; Arnold, S ^[2]

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1. Oak Ridge National Lab., TN (United States)
2. Polytechnic Inst., of New York, Brooklyn, NY Microparticle Photophysics Lab. (United States)

Fluorescence decay kinetics of Rhodamine 6-G molecules in levitated glycerol microdroplets (4--20 microns in diameter) have been investigated to determine the effects of spherical cavity resonances on spontaneous emission rates. For droplet diameters greater than 10 microns, the fluorescence lifetime is essentially the same as in bulk glycerol. As the droplet diameter is decreased below 10 microns, bi-exponential decay behavior is observed with a slow component whose rate is similar to bulk glycerol, and a fast component whose rate is as much as a factor of 10 larger than the bulk decay rate. This fast component is attributed to cavity enhancement of the spontaneous emission rate and, within the weak coupling approximation, a value for the homogeneous linewidth at room temperature can be estimated from the fluorescence lifetime data.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE; National Science Foundation (NSF); USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• OSTI ID: 6977713
• Report Number(s): CONF-9206274-2; ON: DE93000439; CNN: ATM-89-175871
• Resource Relation: Conference: US Army Chemical Research Development Engineering Center (CRDEC) conference on obscuration and aerosol research, Aberdeen Proving Grounds, MD (United States), 22-26 Jun 1992
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLUORESCENCE
KINETICS
RHODAMINES
DROPLETS
GLYCEROL
LEVITATION
SIZE
ALCOHOLS
AMINES
CARBOXYLIC ACIDS
DYES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
LUMINESCENCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PARTICLES
REAGENTS
400201* - Chemical & Physicochemical Properties